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Everything about Roof Ventilation

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An unvented roof assembly is feasible only if you keep the roof sheathing warm enough to avoid conditioned air from condensing towards it. The map at suitable, that's according to table R806.4 in the IRC, lists the bare minimum R-values necessary to avert condensation in unvented assemblies in different local http://alexisvnyht.amoblog.com/new-step-by-step-map-for-roof-ventilation-9018921

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